YOU want to know how long it’s been since the Yankees lost a series at home? Tiger Woods was scuffling at a prominent local tournament, but it was the Open at Bethpage, not the Barclays at Jersey City. Carlos Beltran was still a fixture in center field for the Mets. Jon and Kate were still together.

That was June 16, 17 and 18, and it was the Nationals who took two out of three at the Stadium, and that should tell you all you need to know about the whims and the whimsy attached to the winning and losing of baseball games. And how extraordinary it is that the Yankees went 7-0 in the last seven series here.

“We really enjoy playing here,” Johnny Damon said with an impish smile. “It’s a real home-field advantage every time we play here. We really feel that.”

Of course they do, and of course they should. The Yankees have won 42 of the 62 games they’ve played in their new digs, even after yesterday’s 7-2 loss to the Rangers that cost them their first home-field series in 70 days. They are 11 games over .500 on the road, too, so they’d be pretty hard to beat if you laid out a diamond in Greenland.

But they are especially relaxed here. They have won walk-offs by the boatload. They nearly came from about 30 runs back in the ninth inning Tuesday night, and the lone surprise was that they didn’t pull it out. They couldn’t look more comfortable at the new Stadium if they played in smoking jackets and slippers.

But even Damon, who’ll have to credit the new yard for making him a couple extra million bucks wherever his next contract lands him, had to admit something else.

“Other teams do their homework, and they know what they need to do to win here, and when they’re good teams, it pays off because they turn and burn,” he said. “And that is a good team.”

Maybe the Rangers are good enough to finagle their way into the playoffs, into a first-round date with the Yankees. If they aren’t, it will be because the Rays or the Red Sox were good enough, or because the seedings shook the Tigers, Twins or White Sox here. Here is something all of those teams will have in common:

They’ll all know that the Yankees love hitting here.

And they will all soon learn that they don’t mind it so much, either.

That should be the underlying concern of playing in such a quirky — it sounds so much better than “gimmicky,” doesn’t it? — ballpark, especially in the short series of October. Yes, these Yankees look like a combination of the ’27 and ’61 superpowers, but what the season has taught us is that they are not a product of the park, that they rake just as well on the road, so what seems like a gross advantage isn’t nearly as vast as you think.

What the park does, instead, is provide teams that have power — like the Rangers, with the likes of Ian Kinsler (who hit two yesterday, and whose blast off A.J. Burnett turned yesterday’s game upside-down) and Josh Hamilton and Nelson Cruz and Michael Young — with an unqualified equalizer in a short series. Yes, every member of the Yankees’ order can crush one into orbit.

But here, so can the other guy.

And if the other guy is good enough to make it to the American League playoffs, then they’re as likely as not to welcome the chance to take target practice (even if their pitchers might vehemently disagree).

Yankees manager Joe Girardi may not buy it. “I can’t expect any of our pitchers to be perfect 100 times out of 100,” he said. “Even the pitch to Kinsler — sometimes a hitter takes that, sometimes he swings and misses, sometimes he pops it up.”

Fair enough. Still, all you need to see is the way other guys’ eyes light up when they walk on the field — and it isn’t because of Monument Park — to see what the Yankees might be up against in October. They have enough offense that it might not make much difference. But you wonder if anyone has enough defense, with those walls. Even the home team.